High-pressure piston or reciprocating compressor or the like



C. SCHAER March 24, 1931.

HIGH PRESSURE PIsToN 0E REGIPROGATING coMPREssoRloRfTHE LIKE Z M vo .Huh.br 7 J .d 7u um F "rsy CHARLES semina, on Landman-rari, swrrznnrlnivn,ynssrcrnoaein yman'Frein orf l summa nannies socrnfrnnnorwrviabrWINTERTHUR, swrrzERLAND z HIGH-PRESSURE Prsroir or;nncrrno'onrrnecorrrassson on 'merma' Application filed January 26, 1928,Serial No. 249,627, and'zi'nwtzerland vAprilrlpf), ,.L27..Y

This invention relates to high pressure piston orreciproca-tingcompressors or the like of the lrind in which the driving apparatusdrives the compressor through the mediumyof an oscillating column ofliquid.

4 According to the present invention the intermediate piston of thecompressor is located above the working piston of the compressor. Theliquid coiumn'directly actuated by the 1o piston of the drivingapparatus can either act on that face'of each intermediate piston rwhichis nearer to or directed towards its rel spective working piston oralternatively, on

that face ofveach intermediate piston which is V remote from itsrespective-working piston.

The invention is diagrammatically illustrated by'wayof example in theaccompanying drawing, in whicl Y Figure l is a section through the twoupper stages of a compressor,

Figure 2 is a view partly in plan and partly "in gross-section onk theline I-I of Figure l,

an u v l, vFigure 3 shows fa modification according to the invention. l

In the construction shown in Figures 1 and 2 the cylinders 3 and 4" forthe intermediate pistons 5 and 6 of thecompressor are mounted inthecasings-l and'2.

Y 3o The primary piston 8 actuated by a driving machine not shown,reciprocates in the cylinderI 7' containing a column of liquid. Thecompressor pistonslO and 11 draw the working ymedium intothe .cylinders.12 and 14 where it is compressed, the intermediate piston 5 of onestage being located above the compreseor piston 10 and the intermediatepiston 6 of the other stage above thecompressor piston 1l. l The liquidcolumn inthe cylinder 7 l, l

when'super-highpressure compressors 'are 40 actuated by the primarypiston 8 of the driving machine is disposed between those sides of theintermediate pistons which face'towards the piston ofthe compressor andat a` n' point lower lthan lthe liquid column 13 between the twointermediate pistonsv and 6.

Figure 3 showsa modification in whic'hthe liquid column in the cylinderv7 actuated by the piston- 8 of the 'driving machine, not shown in thedrawing, is located on that side i .50 ofthe pistons 5, Gremote from thepiston of thecompr'essor at ay point higher than the liqlivid column 13betweenthe pistons 5 and 6; j hen the pistonS (Figure 2) movesin thedirection of I.the arrow l5 liquid f passes throughthe passage 1 6 tothe .underside'of the pieton which is thus forced upwardly anddrawsthemedium to be compressed, for examplev gas, into the-cylinder.. 14. Atthe Sametime, however, the liquidcolumn 13 forcesthe piston 5 downwardlywhilst the liquid column between vthe underside of the pistonT 5 and thevpiston 8 is` forced through the passage` 17. The jcompressorpiston 1Qis thuscaused-toy compress the medium 'drawn into the cylinder 12.*,1vrf.' By means ofthe A'arrangement shown the pistons 10 and'll'vwhicheffectthe compression may be arranged asdownwardly acting pistons,Awhen'the. following advantagesare obtained.

(-1) Thi-impuaies 'drawn in by the gas f6 be compressedvareheld backfromthe stuffing boX as theycannot pass betweenthe piston and thepacling,but fall from the endface ofthe ypiston tothe valve end ofthe cylinder.(2)` Any liquid drawn in falls to the"'valve end of'the cylinder, and,lifmuch liquidis present, it is forced out throughthedelivery valves sothat no waterv hammer can take place. :Liquid alwaysfclings-even ifVonly in'4 small amou-nts%tothe valves,.`so,that the Y liquid remainingybetween the valve and, its

Vseati'nfgfprote'cts the valveswhen they come down on,v totheirgseatings.

(3),The cylinders, instead Vof being ranged' vertically,"l may' besuspended downwards, 'which' 'is yparticularly of advantage'forthoseffstagesoperating at very high pressures,vr This arrangement veryimportant since,I

arranged vertically,` 'safety vdevices must be provided, asconditionsdue to unforeseen faultsin the material, or to structuralmodi-l fic'ati'ons owing to vvarying strains, or due to chemical actionby the medium to be compressorsworking at normal pressures. 1 Thesuspendedarran'gement ofthe cylinders also seV enables the safetydevices to be arranged in the foundation 18, i, e., the foundations maybe constructed so that the engine room space need not be used to housethese safety devices.

:'Iclaim': Y Y Y 1. In a highV pressureV reclprocating compresser, thecombination with a horizontally arranged primary piston effecting` apositive movement', of' a plurality oi' vertically ar'- rangedintermediate pistons, a plurality of compressor pistons arranged beneathsaid intermediate pistons, and adapted to be actuated thereby, anoscillating column of liquid between one side of said primary piston andl one-0f said intermediate pistons, anvoscillating liquid column betweenthe other sideof said primary piston andV another of said intermediatepistons, and an oscillating c-olumn of liquid between said intermediatepistons;

2. In a highl pressure reciprocating compressor, the combination with ahorizontally arranged primary piston effecting a positive movement, of aplurality of vertically arranged intermediate pistons, a plurality ofcompressorr kpistons arranged beneath said intermediatepistons andadapted to be actuated thereby, an oscillating column of liquid betweenone side of said primary piston and one of said intermediate pistons,.anoscillating 'liquid column between the other side of said Yprimarypiston and another of said intermediate pistons, said columns acting onthat fac-e of .each intermediate piston, which is'Y nearest itsrespective' compressor pist-on,

andan oscillating column of liquidrbetween said'intermediatefpistons Y8i' In'aphigh pressure reciprocating compressor,the combination with aYhorizontally arranged primary piston effecting a positive movement, ,ofa plurality of vertically arranged intermediate pistons, a plurality ofcompressor pistons arranged. beneath said intermediate' pistons andadapted-to be actu-v ated thereby, an oscillating column of liquidbetween one side of said primary piston and oneof said intermediatepistons, anoscillating `liquid column between the other side. of 4saidYprimary `piston and another o'sai-d intermediate pistons, said columnsacting on that face of each intermediate piston` which is remcte fromits respective compressor piston, andanoscillating column of liquid be-vtween'said intermediate pistons.

In testimony whereof I have aliiXed my signature.v v. g.

. Y VCHARLES SCHAER.

